net: ipv6: clear suppressed fib6 rule result (Linux Linux)

CVE-2026-74581
CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.42 % · centile 36 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Received

Description

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: clear suppressed fib6 rule result fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(), but leaves res->rt6 pointing at the released rt6_info. If no later rule supplies a replacement, fib6_rule_lookup() still sees res.rt6 and returns that stale dst to its caller. A suppressing rule can therefore leak a released route back to rt6_lookup(), and the next put hits rcuref_put_slowpath() from dst_release(). Clear res->rt6 when suppressing the route so suppressed lookups fall through to the null dst instead of reusing the released one.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected 209d35ee34e25f9668c404350a1c86d914c54ffa < 90c57310e266eb94e4a80d6b15a9ca131d2e82cb ; affected 8ef8a76a340ebdb2c2eea3f6fb0ebbed09a16383 < 5d29b286c9de0b309e94b9ed083aa1a2f429434f ; affected cdef485217d30382f3bf6448c54b4401648fe3f1 < 354db6243eca59e9d187ffbf8b7955b044ce84dc ; affected cdef485217d30382f3bf6448c54b4401648fe3f1 < 6d98c70fe0ba8c7708bfd5b2a5174d2086775daa ; affected cdef485217d30382f3bf6448c54b4401648fe3f1 < 9bad152c42b37499162367fe47867411e62fffa3 ; affected cdef485217d30382f3bf6448c54b4401648fe3f1 < dc3ab04220667f254f4348572b2a0b3febff89fb
Linux · Linuxaffected 5.16 ; unaffected 0 < 5.16 ; unaffected 5.10.265 ≤ 5.10.* ; unaffected 5.15.216 ≤ 5.15.* ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.151 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD